v0.4.0

Released 21 August 2026.

Install

go install github.com/caspel26/goninja/cmd/goninja@v0.4.0
go get github.com/caspel26/goninja@v0.4.0

Requires Go 1.25 or newer.

Added

Configure errors once for the whole API

API.SetErrorMapper registers typed error mappings on the application and applies them to resources that do not set their own mapper. Use goninja.NewErrorMapping to define a mapping and goninja.NewErrorMapper to compose mappings into a mapper.

Config.DefaultErrorMapper remains available for an explicit mapper supplied to MountWithConfig. A resource-level mapper has the highest priority, followed by the config/API default, then goninja’s built-in default mapper.

This lets applications share consistent error responses without repeating configuration on every generated resource.

Links

• Release on GitHub
• Diff since v0.3.1
• CHANGELOG.md